Photo by: Linda A. Cicero
Alvin Roth, a Harvard University scholar who is a visiting professor at Stanford University, takes a phone call at his home in Menlo Park, Calif., on Monday, Oct. 15, 2012, after being awarded the Nobel economics prize. Mr. Roth, 60, and Lloyd Shapley, 89, two Americans, were awarded the Nobel for their studies on the matchmaking that takes place when doctors are coupled up with hospitals, students with schools and human organs with transplant recipients. The work of two has sparked a flourishing field of research and helped improve the performance of many markets, the Royal Swedish Academy of Sciences said. (AP Photo/Stanford News Service, Linda A. Cicero)

Robert Mueller’s special counsel investigation into Russian meddling in the 2016 election has cost $6.7 million during the first four and a half months of the probe. Click to see past independent counsel investigations guilty of racking up high bills.